sorry for your loss but if the others are picking up then thats a great thing, well done
misscosmo if you have removed your snails from a tank with disease hen as soon as they are put back in the tank may well get the trouble back as they still carry diseases although they arent effected by things like ich, so beware!I am treating my tank with protozin but i had to remove my snails which are now in a bucket of tank water. My corys are fine with the med.
~AJ~